Oil-circulatory system or apparatus.



1. DAIMLER.

OIL GIRGULATORY SYSTEM 0R APPARATUS. APPLIOATION FILED Nov. 15, 1910.

1,01 2,8321 Patented Dec. 19, 1911. I l 3 SHEETS-BREST 1.

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- l oIL GIRCULATORY SYSTEM (1R-APPARATUS.

. APPLICATION PILEDV NOV. 15, 1910. 1,012,332.,

Patented Da c. 19, 1911.

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-P. DAIMLER. oIL GIRGULATORY SYSTEM 0R APPARATUS.

APPLICATION FILED NOV. 15, 1910.

1,012,332. Patented Dec.19,1911.

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UNITED STATES PATENT OFFICE. PAUL DAIMLER, or UNTEn'rRKHEIMsTur'iGAnT,GERMANY, AssIGivon 'ro THE iInM oF DAIMLER-MoTonEN-GESELLSCHAFT, FUNTEnTnKHEIM-s'rurreanr, vsien.-

MANY.

Specification of Letters Patent.

OIL--CIRCULAJJ'IOBY SYSTEM 0R APPARATUS.

Patented Dec. 19; 1 911.

Application led November 15, 1910. Serial No. 592,415.

To all 'whom 'it may concern:

Be it known that I, PAUL DAIMLER, a subject of the King of Wurttemberg,and resident of Untertrkheim-Stuttgart, in the Kingdom of Wurttemberg,German Empire, have invented certain new and useful Improvements in andRelating to Oil-Circulatory Systems or Apparatus, of which the.following is a specification.

. This invention relates to an oil circulat ing system or arrangementespecially ap-r plicable for lubricating the various parts to belubricated in the motors' of automobiles. In such lubricatingarrangements the renewing .of the lubricant or the addition of fresh oilthereto has been eected here'- tofore in such a manner that fresh oilfrom time to time was supplied to the vessel where- Y provides Iinaddition to .the circulating pump, a pump which draws from a fresh oilcontainer and conveys the oil into the pipe that leadsfrom thecirculatingpump to the parts to be lubricated. By this arrangementY thefresh oil pump can be so combined with the circulating pump that thepiston of the latter at the same time forms a piston valve for the freshoil pump, and that the fresh oil is conveyed into the pipe for supplyinglubricating oil. In order to be able to regulate the feed or fresh oil`at any.

time the stroke of the fresh oil pump may be made adjustable. I

In orde-r to enable this invention to be readily understood reference ismade to the accompanying drawings in which:

Figure 1 is a side view of a constructional form of the invention,partly in section. Fig. 2 shows a section through the system orapparatusaccording to thel line A-B of Fig. 1, certain parts beingomitted and others broken away. Fig. 3 is a section according to theline C-D of Fig. 2, certain parts being omitted and others broken away.Figs. 4-7 are diagrams illustrating the several pistons of the pumparrangement in various positions.

Referring to Figs. 1-3 the casing a of the circulating pump is providedwith three barrels I), c, d.- In the middle barrel c works the piston eof the circulating pump. Thispiston e is driven by `an eccentric. f fromthe shaft g mounted in suitable bearings ofthe upper portion ofthecasing a. In the barrel d is rovided a piston slidevalve 7i which issuitably worked by an eccentric i from the same shaft g as the piston e.In the barrel b is working a'piston c which receives movement by aneccentric Z from the shaft g. The shaft g isv driven by a pulley m orthe like.

The .pistone and the slide-valve h are each-provided with a reducedportion or neck n, o, respectively.' The barrel c is in communicationIby suitable openings p p with the barrel b and at its bottom by theopening 'g with the barrel d. The latter is in communication with areceptacle r, wherein the oilv collects from the various partsto belubricated. The barrel d` is at or 'near its/middle portion connectedwith a pipe-s leading to the various parts to be lubricated. The barrelc is at or near its middle portion in communication'with a fresh oiltank t by means of a pipe u.

The working of the apparatus according to the present invention will nowbe explanned with referencer to Figs. fir-7. In

` ig. 4 the piston e of the circulating pump' isk in the middle of itsforcing stroke. The lower part of the piston-valve h closes the passageto the oil collecting receptacle r so that the circulating oil below thepiston e is forced by the latter into the lubricantsupply pipes, asindicated by the arrow in Fig. 4. The piston valvev h is here in itslowest position and so also is the piston k of the fresh oil pump. Asthe piston e moves `still farther and descends from the position shownin Fig. 4 it continues to force the circulating oil into the pipe s. Atthe same time the piston 7c of the fresh oil pump effects the first partof its suction stroke, and as soon as the reduced portion or neck n inthe piston e uncovers the openings or ports p u the piston la sucks infresh oil from the port u. The several pistons are now in the lpositionshown in Fig. 5, where the piston e of the circulating pump is at theend of its pressure stroke. In this position the piston valve h closesthe passage v to the oil collecting receptacle 1' and, at the same time,shuts off communication with the port to the'oil supply pipe s, whilethe fresh oil pump is in the middle position of its suction stroke.During further movement the piston lr: of the fresh oil pump continuesto suck,.while the sliding 'piston valve h moves upward so as to openthe 'connection between the barrel o of the circulating pumpand the.passage/v which leads to the collecting vessel or receptacle 1'.Consequently, the piston e in lts upward stroke may draw oil from thecollecting vessel. Fig. 6 shows the position when the piston 7c of thefresh oil pump has completed its stroke and the piston e of thecirculating pump is in the middle of its suction stroke. The fresh oilwhich has been drawn in by the piston la is now forced into the barrelor cylinder c of the circulating pump, as shown in Fig. 7. When the portor opening g connecting the lower portion of the cylinder or barrel cwith the passage 'v or pipe s is uncovered by the piston valve h thefresh oil now contained in the cylinder 0 is forced by the descendingpiston e to the parts to be lubricated through the pipe s, as indicatedby the arrow in Fig.` 7.

It is preferable to provide means for adjusting the stroke of the pistonk of the fresh oil pump. In the constructional form illustrated in Fig.1 an adjustable abutment is shown. The eccentric Z works in a slider rwmovable up and down in a frame which is connected by an eye y with therod of piston k. In the upper bar of the frame fu an abutment e isadjustably mounted by means of a screw. By adjusting the abutmentdownward in the frame the clearance between the slider w and theabutment z may be reduced and the stroke of the pump increased, and viceversa.

I claim:

1. In an oil circulatory lubricating system, a main pump circulating oilto and from the parts to be lubricated and an auxiliary pump parallel toand arranged at the side of said main pump, said auxiliary pump suckingoily from a fresh oil supply and directly supplying it to said mainpump.

2. In an oil circulatory lubricating system, a main pump circulating oilto and from the parts to be lubricated, an auxiliary pump parallel toand arranged at the side ofl -said main pump, said auxiliary pumpsucking oil from a fresh oil lsupply and directly supplying it to saidmain pump, a driving shaft, eccentrics on said shaft for operating thepump -pistons and means for adjusting the stroke of said auxiliary pumpcomprising a frame connected to the piston ofthe auxiliary pump, ablocksliding in said frame and fitting on the eccentric of the driving shaft,and an adjustable abutment for said block, said abutment being carriedby the frame.

3. In an oil circulatory lubricating system, a main pump circulating oilto and from the parts to be lubricated, an auxiliary pump parallel toand arranged at the side of said main pump, said auxiliary pump suckingoil from a fresh oil supply and directly supplying it to said main pump,and a piston valve parallel to-and arranged at the side of said mainpump, said piston valve controlling communication between said main pumpand the 'oil circuit.

4. In an oil circulatory lubricating ,sysi

tem, a main pump circulating'oil to and from the parts to be lubricated,a fresh oil supply, andan auxiliary pump for sucking oil from said freshoil supply and supplying the fresh oil to the oil circuit, the piston ofsaid main pump being adapted to control communication between saidauxiliary pump and the fresh oil supply.

5. In an oil circulatory lubricating system, a main pump circulating oilto rand from the parts to be lubricated, a fresh oil supply, and anauxiliary pump for sucking oil from said fresh oil supply and supplyingthe fresh oil to the oil circuit, the piston of said main pump beingadapted to control communication between said auxiliary pump and theAoil circuit.

6. In an oil circulatory lubricating system, a main pump circulating oilto and from the partsto be lubricated, a fresh oil supply, and anadditional pump for sucking oil from said fresh oil supply and forcingthe fresh'oil into the oil circuit, rthe piston of said main pumbeingvsuch that communication is cut o between said additional pump andthe fresh oil supply, when communication is established between 4thecirculating pump and the parts to be lubricated, so as to deliver oil tothe latter, and communication established between said additional pumpand the fresh oil supply when the circulating pump is cutv ofi' from theparts to be lubricated.

7. In an oil circulatory lubricating system, a pump circulating oil toand from the parts to be lubricated, a fresh oil supply, an additionalpump for sucking oil from said fresh oil supply and forcing the freshoil into the oil circuit, and valve means so arranged that'communication is established In Witness whereof I have hereunto setbetvfeenfsaid pumps dlring the pressure my hand in the presence of twoWitnesses. stro re o said additiona pump 'so as to deliver the fresh oilto the circulating pump PAUL DAIMLER and thereby mix the fresh oil withthe oil Witnesses:

drawn in by the circulating pump. from the ROBERT UHLAND,

oil circuit. ERNEST- L. ENTENMANN.

